Transmission lock



Jan. 11,1927. 1,613,698

R. N. FLINT ET AL v TRANSMISSION LOCK Filed- Oct. 27, 1924 @sheets-sheet 1 zz I L! www WSA/ZZ Jag 11 1927 R. N. FLlNTEr Al.

TRANSMISSION LOCK Filed oct'. 27. l1924 '2 sheets-sheet .v 70 f 7475 l. Y. H, l 5 I 44 6 'fz Z0 a j vwentow Faim? N .F7/h2 and L/gyd Elan/imams Patented Jan. 11, 192.7.

UNITED STATES 'OFFICE :RALPH N. EEINT, E pEmRorT, AND LLOYD BLircKMonEgoE rirGH'LANn PARK, MICIII- GAN, ASSIGNoEs To GENERAL Moron-s ',conronArIoN, or DETROIT, MICHIGAN, A

CORPO-NATION or DELAWARE.

TEA-NsivrrssroN iiccix.

Applieatiun inea 'october 27, i924. semi No. Macs?.

rlhis invention relates to transmission locks, and is illustrated as 'embodied in a sliding-gear selective transmission 'for an automobile. Y

An object of the invention is toprovide an inexpensive but effective lock 'for the transmission. ln one desirable arrangen'ient, the key-controlled locking bolt isconnected tothe lever, to move with 'the lever, and when locked engages a part 'ofthe transmission to hold the lever stationary, and .preferably in engagement with both of the shifter forks or their equivalents. In the forms shown'in the drawings, the 'lever 'carries a plate which serves as a guide V'fortlre locking bolt, the bolt being movable toengage a stationary plate orfthelike, or to 'engage `one Aorgbo'th of the shifter;forl@l A ther objects and features of theinvention, including a. novel arrangement preventing unauthorized removal of the pedestal carrying the gear-'shift lever, and various desirable particular constructions, will be apparent from the following description of the illustrative embodiments shown in the accompanying drawings, in'vvhich: p

Figure l isa. vertical'longitudina'l'section .through part ofk one transmission,showing Vthe control lever and 'the lookin side. elevation;

Figure `2'is a horizontal section on the' line l 2-2 of Figure 1, showing the above-der scribed plates in top plan;

Figure 3 is a vertical section 'through the plateson the line 3-8 of-Figure'Q;

vFigure 4 is a vertical transverse section through a second transmission, showing the lever and locl in front elevation;Y n

Figure 5 i's a horizontal section on the 4line 5 5 of Figure 4, showing the plates in top plan', and broken away to show the shifter forlrods and 'to show Lthe yielding pawls in horizontal section; l

Figure 6 is a horizontal section 0n the line 6--6 of Figure 4, showing the mounting of the control lever; I l

Figure 7 is a vertical longitudinal section through a third transmission, showing the lever and lock in side elevation; l y

Figure 8 is a horizontal section on 'tl'ieli'ne 8 8 of Figure 7, l

Figure 9 lis a vertical transverse section through a fourth transmission, showing the lever vand lock infront elevation; and` Figure l() is a horizontal section on the line lO-lOfcf Figure 9.

Each 'of 'the transmissions shown includes a 'casing 2O Vi'nclcsing :change-speed gearing 22, illustrated 'as being of the sliding selective type, Yshifted vby shifter forks 24 and 26 Vhaving notches y2S for the 'end of Va gearshifting control leveiBO. The forks 24 and l26 are yieldingly held in any selected posi'- tion byyieldmg pawl's B2, which also 'serve `further described below, these parts or their vequivalents may be of any desi-red construction.

The gear-shifting controlleve-r BU-of the firsttran'smission isluniversallly mounted o'n a tloin'e' or `pedestal'40. A 42, having a concave flower surface fitting over the top of the pedestal, is secured to the lever, as by a pin 44, and a plate 46 on the inside of thepedestal is held against its'ifnner concave `surface by a spring455.v 'The bottom of the pedestal flits within 4`a 'flan-ge 50 ofthe casing 20, supported by a ledge 52 and secured to the ledge by Abolts or screws 54. A plate 56, having a central opening for the control lever, lits Vwithin flange 50 below the pedestal, 'and is separately'secured to ledge '52 bybolts or screws 58.v This plate has fingers 60, sprung upwardly'to overlap a plate 62 secured to the gearshift Vlever by a pin or the like 64. Plate 56 `and fingers 6() permit plate 62 to move in substantially its own plane, and' thusV permit universal movement of the Y*gear-shift lever, but prevent withdrawal of the lever aindre'inoval ofdome 40,l even after the removal of bolts or screws 54,`by a 'thief attempting in this mannerto secure access to the lock described below. The bottom flange of` the pedestal() prevents access to bolts or. screws 58, and flange 50 prevents prying out the pedestal and plate v56 by means of a cold chisel.

lPlate l62 servesas a guide for a vertically movable locking bolt 66, urged upwardly to unlocked position by a spring 68, and depressible to enter an opening in plate 56 to hold the gearshifting control lever in neutral, and preferably in a position Where it projects into both notches 28. The bolt is controlled by a lock barrel 70, operated by a key 2 to Withdraw a latch 74 and allow it to seat in either of two recesses 76 or 78 formed in part 4t2. It will be seen that bolt 66 is connected to lever 30 and moves therewith. Barrel 70 is held against angular movement by a stationary pin or projection SO entering a slot 82 in its side.

The transmission shown in Figures A, 5, and 6 differs from that described above, in that flange 50 of casing 20 is omitted, plate 62 is not pinned to lever 30 but is held in sliding engagement with plate 56 by spring` 66, and fingers 66 on plate 56 are omitted. ln this transmission, also, the lock is at one side of the control lever, instead of behind it. rlhe third transmission (Figures 7 and 8) differs from the first and second, in that bolt 66, instead of entering an opening` in plate 56, locks the transmission by enter- -ing' a recess formed. half in each of the shifter forks 24, 26. In the fourth transmission (Figures 9 and 10) the bolt enters a recess in fork 26. ln the third and fourth transmissions, plate 62 is directly slidably supported on plane upper surfaces formed on the lever-engaging parts of the shifter forks.

lVhile several illustrative embodiments have been described in detail, it is not our intention to limit the scope of the invention to those particular embodiments, or other- Wise than by the terms of the appended claims.

We claim:

l. A transmission lock comprising, in combination, change-speed gearing and controlling means therefor including` a movable operating lever, a key-controlled locking member adjacent the lever, means connecting said member With the lever so as to cause it to move with the lever, and a part engageable by the locking member' to prevent movement of said means, to thereby lock the transmission.

2. A transmission lock comprising, in combination, change-speed gearing and controlling means therefor including a movable operating lever, a key-controlled locking member arranged alongside and moving with the lever, a part moving with the lever and which part is constructed and arranged to constrain the locking member to move with the lever Without interfering With its locking and unlocking movements, and a part engaged by said locking member to lock the transmission.

3. A transmission lock comprising, in combination, a casing and changespeed gearing therein, an operating lever extending into the casing to control said gearing and Which lever is universally mounted on the casing, a part secured to the lever inside the casing and a part secured to the lever adjacent the point ,Where it passes into the casing, a key-controlled locking member carried by said parts, and means whereby the part aforesaid inside the casing-f may be locked to an element of the transmission.

4. A transmission lock comprising, in combination, sliding change-speed gears, shifter forks for moving the gears and Which forks have notches which are opposite each other in neutral, an operating lever universally mounted to have its lower end swung' into either notch, and key-controlled means to lock the lever and hold it stationary With its end in a central position extending into both notches.

5. A transmission lock comprising, in conibination, gearing and a universally-mounted control lever therefor, a plate secured to the lever to move back and forth and from side tol side With the lever, and key-controlled means to lock the plate to a part of the transmission mechanism, to thereby hold the lever positively against movement.

6. A transmission lock comprising, in combination, gearing and a `universally-mounted control lever therefor, a plate secured to the lever to move therewith, a key-controlled locking bolt carried by the plate, and a stationary plate adjacent and substantially parallel to the movable plate and Which has an opening for the locking bolt to prevent movement of the lever when the transmission is locked.

7. Atransmission lock comprising, in combination, shifter forks and a universallymounted control lever therefor, a plate secured to the lever to Vmove therewith, anda key-controlled locking bolt carried by the plate, the bolt being engageable With a. stationary part to lock the transmission.

8. A transmission lock comprising, in combination, change-speed gearing and a universally-movable control lever therefor, a housing for thegearing, a plate secured to the lever to move therewith, a stationary plate secured to the housing adjacent and parallel to the movable plate, and a locking bolt guided by one of said plates, the other plate having a locking opening for the bolt, said-plates having interengaging portions permitting movement of the lever to control the gearing but preventing separation of the plates.

9. A transmission lock comprising, in combination, change-speed gearing and a casing inclosing the gearing, the casing having an opening for a control lever, a plate having an opening and secured to the casing over the opening, a pedestal secured to the casing over the plate, a control lever universally mounted on the pedestal and extending through the opening in the plate to control the gearing, and means connecting the lever and plate in a manner permitting movement of the lever to control the Ygearing but preventing removal of the vlever and pedestal in a direction away from the plate.

10. A transmission lock comprising, in combination, change-speed gearing and casing inclosing the gearing, the casing having an opening for a control lever, a plate having an opening and secured to the casing over the opening, a pedestal secured to the casing over the plate, al control lever universally mounted on the pedestal .and extending through the opening in the plate to control the gearing, a second plate carried by the lever, and means connecting t-he plates in a manner permitting movement of the lever to control the gearing but preventing separation of the plates.

11. A transmission lock comprising, in

combination, a casing having an opening` surrounded by a supporting ledge and With a flange surrounding the ledge, change-speed gearing inclosed in the casing, a plate having a central opening and supported on the ledge with its edges protected by the liange, a pedestal seated on the plate with its edges protected by the flange, means to secure the plate and the pedestal to the casing, a control lever universally mounted on the pedestal and extending through the opening in the plate to control the gearing, means to connect the lever to the pedestal, and means to connect the lever and the plate in a manner permitting cont-rolling movement of the lever but prevent-ing Withdrawal of the lever, and through the lever preventing reinoval of the pedestal.

In testimony whereof We a'linix our signa tures.

RALPH N. FLINT. LLOYD BLACKMORE. 

